Zero-shutter control for printing tabulators



Nov. 20, 1928.

W. W. LASKER ZERO SHUTTER CONTROL FOR PRINTING TABULATORS Filed April29, 1925 2 Sheets-Sheet W/TNESS:

Nov. 20, 1928.

W. W. LASKER ZERO SHUTTER CONTROL FOR PRINTING TABULATORS Filed April29, 1925 2 Sheets-Sheet 2 Patented Nov. '20, 1928.

UNETED STATES FATENT OFF'lCE.

WILLIAM W. LASKER, F BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,TO REMINGTON RAND INC., 01? NEW YORK, N. Y., A CORPORATION OF DELAWARE.

ZERO-SHUTTER CONTROL FOE PRINTING TABULATORS.

Application filed April 29, 1925. Serial No. 26,687.

The present invention relates to setting mechanism for machines.controlled by perforated cards and relates more particularly to acontrol means for the zero shutters of a c printing tabulator.

In printing tabulators or other machines employing type sectors whichare positioned for predetermined type by registering stops selected bypins in accordance with the lo cation of perforations in a card, it isusual to employ a pivoted shutter carrying a stop to cause the selectorsector to correctly position the zero type for printing purposes. Insuch construct-ions it is necessary to shift the shutit; ter out of thepath of the selector sector holding means, whenever a type number ortype character other than zero is to be set, thus for example whenregistering stop corresponding to the number 5 is set, the zero shutteras is shifted to one side and theselector sector I is free to swing pastthe zero stop and engage the set 5 register stop-so that the 5 type isset for printing. With this arrangement it has been found that the zeroshutter or shutas ters frequently are returned to their normal positionbefore the sector has returned to its initial position and as a resultthe latch lug of the sector member impacts with the zero stopcausing'damage to both parts, disturbso ing the adjustment, and throwingthe timing further out.

Some of the objects of the present invention are to provide an improvedzero shutter control mechanism; to provide a hold out mechanism for zeroshutters arranged to be controlled in timed relation to the movement ofa selector sector of a print sector; to pro vide means positivelyinsuring the return of selector sectors to normal or initial position Mlbefore the zero shutters for such sectors are returned; to provide ahold out lock for zero shutters and means for releasing such lock afterthe printing sectors controlled thereby have returned to normalposition; and to provide other improvements as will hereinafter appear.

In the accompanying drawings Fig. 1 represents a side elevation of aprinting tabulator sector and its control adjuncts embody- 54B ing oneform of the present invention in zero shutter control means; Fig. 2represents a plan of the control stop mechanism showing the zero shutterlocking out means; Fig. 3 represents a sectionon line 3-3 of Fig. 1;

and Fig. 4 represents a detail in side elevation showing the lockedposition of the shutter mechanism.

Referring to the drawings, one form of the present invention is shown asapplied to the control of the zero shutters 10 of a registerlng stopunit 11 by which the respective sectors 12 are positioned so thatapredetermined type is actuated to print at the proper time in the cycleof operations. Generally considered the registering stop units 11 eachconsist of 'rows of stop pins 13 corresponding respectively to thenumbers one to nine arranged consecutively, while at one end is a zerostop 14 carried by the shutter 10 in off set position so that normallythe stop 14 is aline'd with the stops 13 and consequently in position tohold the stop lug 16 on the adjacent selector sector 17. JVhen theperforated card, which controls the setting of the stops 13by raisingone of them (as determined by the card punching) into the path of thelug 16, ispunched in the zero position there is no movement of thecorresponding shutter and the selector control sector 17 is held so thatthe sector 12 is located in its neutral non-printing position. On theother hand when a perforation corresponding to any one of the other stoppins is punched in a column of the card,the zero shutter 10 will beshifted, by the setting of the registering stop pin, out of the path .ofthe sector lug 16 so that the selector control sector 17 is released toswing until its lug 16 abuts the registering stop 13 which is set. Thisbrings the selected type of the sector 12 to its'printing position.

The type sector shown is provided with twenty-three type elements forprinting the alphabet. This sector and its controlling means are shownand described in U. S. Letters Patent No. 1,624,956 granted to W. W.

llasker, April 19, 1927. A more complete description of a type sector ofthis general type is found in U. S. Letters Patent No. 1,274,528 grantedAugust 6, 1918 to C. Foster.

The construction of the shutters 10' and their relation to the stop pin13 is such that the setting of any pin 13 in registering position causesthe shutter for that pin row to be rocked on its pivots to release itszero stop 14 from the sector 17 so that the latter is free to traveluntil its lug 16 abuts the set stop pin 13. Each of the shutters 10 hasa pro;

' 20 as there are shutters and all are under sufficient tension tonormally hold the shutters in zero position and act to return them.

after movement out of position caused by the setting of a number stoppin 13.

For the purpose of locking the shutters 10 in the position each takeswhen a number register stop pin is set in the adjacent row, there are aplurality of bell crank detents 21 all mounted for separate pivotalmovement upon a common rod 22 so that one end 23 of each is alined withand in close proximity to the normal position of the shutter controlledthereby. The opposite end of each of the detents 21 is held in contactwith a restoring rod 24 by separate coil springs 25 interposed betweenthe respective detents 21 and a rod I 26. The two rods 24 and 26 aresupported in parallel relation between two arms 27 which are fixed to arockshaft 28 the latter receiving its motion from a link 29 joined to apush bar 30. The outer end of the push bar 30 is held. by a lost motionconnection, in the form of a pin 31 and a slot 32, in the path of a studpin 33 projecting laterally from an arm 34 which is fast on the mainrock shaft 35.

In the operation of the device the register stop pins 13 are operatedand set in the usual manner in accordance with the perforations in thecontrol cards, and the sectors 12 are released to be brought to stopposition with the type corresponding to the set stop pins in printingposition. The raising of a stop pin 13 in any of the rows causes thezero shutter for the set pin row to be swung back out of the path of theselector sector so that the latter is free to travel until it abuts theset stop. The timing of the main shaft 35 is such that the pin 33 movesout of the path of the end of the push bar 30 sothat the latter is freeto move to the right as seen in Fig. 1, thus removing the pressure ofthe restoring rod 24 from the detents 21 so that those detents 21,

,. from the path of which the shutters have been removed, are swungclockwise bythe action of their springs 25 to thus respectively looktheir shutters in abnormal position. By this means the shutters 15 areprevented from returning to normal position when the set stops 13 arereturned and cannot therefore get in the path of the returning selectorsectors. As the main shaft 35 causes the positive return of the sectorsit is arranged so that the pin 33 on the arm 34 does not engage the pushbar 30 until the sectors 12 and 17 have reached the end of their returnstroke. \Vhen this occurs the push bar 30 is moved to the left as seenin Fig. 1 to thereby rock the shaft 28 and cause the restoring rod 24 toengage and swing" such detents as are in locking position back to normalposition removed from the path of the respective set shutters 10. Therelease of the shutters 10 allows the springs 20 to function and returnthe shutters so that the zero stops 14 thereof are in holding positionin front of the shutter lugs 16.

It will now be apparent that a complete unitary control has beenprovided for coaction with the zero shutters of a. selecting'unit forprint or type sectors whereby apositive timing relation is establishedbetween the return movement of the print and selector sectors and thezero shutters so that the former are insured of return to normalposition before the latter are returned.

\Vhile only a single form is shown in which this invention may beembodied, it is to be understood that the invention is not limited toany specific construction, but might be applied to various forms'without departing from the spirit. of the invention or the scope of theappended claims.

Having thus described my invention, I claim:

1. In combination, a movable part, selecting members for positioningsaid part in any one of a number of predetermined positions, a shutterdevice for holding said part in initial position, means for shiftingsaid device out of the path of said movable part when one of saidselecting members functions, and means holding said device in shiftedposition until said part returns to initial position.

2. In combination, a movable part, selecting members for positioningsaid part in any oneof a number of predetermined positions, a stoparranged to latch said part in initial position, means for shifting saidstop to release lsaid part, means for holding said stop in shiftedposition, and means for releasing said holding means to cause said stopto return to latching engagement with said part.

3. In combination, a movable part, selecting members for positioningsaid part in any one of a number of predetermined positions, a zero stoparranged to latch said part in zero position, means to shift said stopto release said part when a selecting member is actuated, means forholding said zero stop in shifted position, and means for releasing saidholding means at a predetermined time in the stroke ofsaid moving part.

4. In combination, a movable part, selecting members for positioningsaid part in any one of a number of predetermined positions, a zero stoparranged to latch said part in zero position, means to shift said stopto release said part when a selecting member is actuated, and means forholding said zero stop in shifted position until said movable part hasreturned to normal position.

5. In combination, a type sector, means for controlling said sector, astop for holding said controlling means inoperative, means for shiftingsaid stop to release said controlling means for operation of saidsector, and

means operative until after the return of said sector control means forholding said'stop in shifted position.

6. In combination, a type sector, means including a lug for controllingsaid sector, a stop arranged in the path of said lug and normallyholding said controlling means ino erative, means for moving sald stopout o the path of said lug under certain conditions to release saidcontrolling means for operation of said sector, and means operativeuntil said lug returns to normal position for holding said stop out ofthe path of said lug.

7. In combination, a type sector, means including a lug for controllingsaid sector, a plurality of alined character stops arranged respectivelyto be projected into the path of said lug, a pivoted shutter in closeproximity to said character stops, a zero stop on said shutter normallyengaged by said lug to hold said controlling means in zero position,means for shifting said shutter to release f said zero stop when acharacter sto is actuated, and means for locking said'sliutter inshifted position. I 8. In combination, a type sector, means including alug for controlling said sector, a

plurality of alined character stops arranged respectively to beprojected into the path of said lug, a pivoted shutter in close prox- 80imity to said character stops, a zero stop on said shutter normallyengaged by said lug to hold said controlling means in zero position,means for shifting said shutter to release said zero stop "when acharacter stop is actuated, means for locking said shutter in shiftedposition, and means for releasing said locking means at a predeterminedtime.

9. In combination, a type sector, means includin plurality of alinedcharacter stops arranged respectively to be projected into the path ofsaid lug, a pivoted shutter in close proximity to said character stops,a zero stop on said shutter normally engaged by said lug to hold saidcontrolling means in zero position, means for shifting said shutter torelease said zero stop when a character stop is actuated, means forlocking said shutter in shifted position, and means for releasing saidlocking means when said sector control lug has returned to a positionback of said zero stop.

Signed at Philadelphia, in the county of Philadelphia and State ofPennsylvania, this. 9th day of April, 1925.

WILLIAM W. LASKER.

a lug for controlling said sector, a

